Quarterly report pursuant to Section 13 or 15(d)

Line of Credit, Short-Term and Long-Term Borrowings - Long-Term Borrowings (Detail)

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Line of Credit, Short-Term and Long-Term Borrowings - Long-Term Borrowings (Detail) (USD $)
In Thousands, unless otherwise specified
Sep. 30, 2013
Dec. 31, 2012
Debt Instrument [Line Items]    
Capital lease obligations $ 0 $ 10
Long-term debt 131,466 140,185
Less current installments 11,935 11,668
Total long-term borrowings 119,531 128,517
Note payable to banks one [Member]
   
Debt Instrument [Line Items]    
Note payable to banks 79,160 79,916
Note payable to banks two [Member]
   
Debt Instrument [Line Items]    
Note payable to banks 24,950 29,010
Note payable to banks three [Member]
   
Debt Instrument [Line Items]    
Note payable to banks 25,518 29,213
Note payable to TCF Equipment Finance, Inc. [Member]
   
Debt Instrument [Line Items]    
Note payable to TCF Equipment Finance, Inc. $ 1,838 $ 2,036